Thanks to the topic starter and contributors, I made my USB link to the PLX wide band using $6.25 module from Amazon (http://amzn.com/B006JKNWLE) and a 3.5mm headset jack, which I inserted to the Tx socket on the SM-AFR module. Worked fine in RomRaider immediately, no hassle. Highly recommended setup.Now I need to find a Y connector to keep the AFR module in the daisy chain while still connected to the logger PC.

I've got my car pc and the wideband controller grounded at the same point. I'm using the acc-on line from the car pc shutdown controller as the 12v supply for the wideband. Maybe I should reconfigure this with a relay and use the 12v rail direct from the battery, fused of course.

I just built a cable using one of these: https://www.sparkfun.com/products/9717 My sensor should arrive this afternoon. I'll confirm it works then. Assuming it works, this would seem to provide a very elegant solution.

Sorry to bump such an old thread but I wanted to share some of my experiences with this process.

First started attempted to use an FTDI TTL-232R-3V3-AJ cable with no luck.Also tried swapping the TX and RX lines, but still no data.Maybe the signals need to be inverted? I guess I could have tried changing this in ftprog...

Anyway, I followed the advice of this thread and got the USB serial adapter from Pololu (Item 391, with the CP2102) which costs about $15.This worked fine just like everyone else has reported.

While browsing Pololu's site for the adapter, I also noticed another usb serial adapter that they sell, Item# 1308, is also TTL serial, but only costs $6 compared to $15.I couldn't resist and picked one of these up at the same time.I'm happy to report that it also works great with the PLX.

As a side-note, I measured the output voltage of the PLX, and was surprised to find it only puts out 2.98-3V or so but I guess it's close enough to 3.3V

The serial output? Did you use an oscilloscope or voltmeter?

Voltmeter so it's not the best way, but I've managed to read various voltages of serial outputs from various devices with this same meter and they've mostly been much closer to their specified voltages.Like I said though, it seems to work just fine which is all that really matters, but it was a slight curiosity.

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